Sudhamma Khamdai. 2007. A comparative study between Thai and foreign first year students' language needs at Humanities' Faculty of Mahachulalongkornrajavidyalaya University. Bangkok:Thammasat University; DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/TU.the.2007.106
Sudhamma Khamdai. (2007) A comparative study between Thai and foreign first year students' language needs at Humanities' Faculty of Mahachulalongkornrajavidyalaya University (รายงานผลงานวิจัย). Thammasat University:Bangkok. DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/TU.the.2007.106
Sudhamma Khamdai. A comparative study between Thai and foreign first year students' language needs at Humanities' Faculty of Mahachulalongkornrajavidyalaya University. Bangkok:Thammasat University, 2007. DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/TU.the.2007.106
Sudhamma Khamdai. (2007) A comparative study between Thai and foreign first year students' language needs at Humanities' Faculty of Mahachulalongkornrajavidyalaya University (รายงานผลงานวิจัย). Thammasat University:Bangkok. DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/TU.the.2007.106